Refuse bodies



Jan. 10,1967 G. s. PARK ETVAL 3,297,180

REFUSE BODIES Filed Feb. 23, 1965 4 Sheets-Sheet l INVENTORS GLENNS.PARK RAYMOND R. SZAJ ATTORNEYS Jall- 7 G. s. PARK ETAL 3,297,180

REFUSE BODIES Filed Feb. 25, 1965 4 Sheets-Sheet 2 \NVENTORS GLENN S.PARK RAYMOND R. SZAJ ATTORNEYS Jan. 10, 1967 G. s. PARK ETAL REFUSEBODIES 4 Sheets-Sheet 3 Filed Feb. 23, 1965 INVENTORS GLENN S. PARKRAYMOND R.SZAJ

ATTORNEYS Jan. 10, 1967 s. PARK ETAL 3,297,180

REFUSE BODIES Filed Feb. 23, 1965 4 Sheets-Sheet 4 w MMN Q Q INVENTORSATTORNEYS GLENN S. PARK RAYMOND R. SZA'J BY W United States Patent3,297,180 REFUSE BODIES Glenn S. Park, New Berlin, and Raymond R. Szaj,Hales Corners, Wis., assignors to The Heil Co., Milwaukee, Wis., acorporation of Wisconsin Filed Feb. 23, 1965, Ser. No. 434,448 16Claims. (Cl. 214-833) This invention relates to improvements in refusebodies.

Heretofore, refuse bodies have been proposed wherein the refuse isdumped directly into the lower end of the tailgate and wherein ascraper-packer member moves the refuse directly from the bottom of thetailgate upwardly and forwardly into the body and simultaneously exertsa packing action. In this type of construction the scraper-packer platemakes its return movement in an elevated postion so that material can bedumped substantially continuously into the tailgate without waiting fora cycle of the packer plate to be completed.

Heretofore, constructions of this type have included hydraulic actuatingmembers and arms which are disposed within the tailgate. This isobjectionable as they operate in the refuse. Another problem with priorconstructions of this general type is that when the packer-scraper platemoves downwardly toward a position to start scraping refuse from thebottom of the tailgate into the body, if an obstruction is encounteredin the form of an unduly bulky and rigid member, there is a tremendousstrain placed on the tailgate, packer plate, hopper, and associatedmechanism. While a conventional relief valve might be devised to stopthe operation in the event of encountering an obstruction, such stoppingis undesirable as it interrupts the operation and requires manualrestarting of the cycle.

It is a general object of the present invention to provide an improvedrefuse body of the type wherein refuse is delivered directly from thebottom of the tailgate into the body by a scraper-packer plate andwherein all of the operating mechanism for the scraper-packer plate isexternal and, therefore, out of the refuse.

A further object of the invention is to provide an improved refuse bodyconstruction as above described wherein there is novel means to providefor stopping the downward movement of the booms whenever an unusualobstruction is encountered, to thereby provide a sufi'icient gap betweenthe lower edge of the scraper-packer plate and the bottom of thetailgate to relieve the condition, and thus permit the swingingoperation of the scraper plate to occur and continue without loss oftime and without breakage or distortion of parts.

A further object of the invention is to provide an improved refuse bodywherein the parts are so arranged that the forward part of the tailgateserves to increase the effective size of the body.

A further object of the invention is to provide a refuse body as abovedescribed which permits substantially continuous dumping of refuse intothe tailgate, and which provides for rapid and effective compression andpacking.

With the above and other objects in view, the invention consists of theimproved refuse body, and all of its parts and combinations, as setforth in the claims, and all equivalents thereof.

In the accompanying drawings, illustrating one complete embodiment ofthe preferred form of the invention, in which the same referencenumerals designate the same parts in all of the views:

FIG. 1 is a fragmentary perspective view showing the rear end of theimproved refuse body with the scraperpacker plate about to start ascraping operation;

FIG. 2 is a partially diagrammatically side elevational view of the tailgate showing the scraper-packer plate in "ice packing position justprior to the start of a new cycle of movement;

FIG. 3 is a view similar to FIG. 2 showing the position of the partsafter the scraper-packer plate has started its rearward return movement;

FIG. 4 is a similar view showing a progressively advanced position ofthe parts wherein the scraper-packer plate is about ready to start itsdownward travel;

FIG. 5 is a similar view showing the scraper-packer plate about ready tostart a scraping movement;

FIG. 6 is a further advanced position showing in position a the scrapingmovement partially completed and in position b the scraping movementcompleted;

FIG. 7 is a fragmentary side elevational view showing the upper end ofone of the booms;

FIG. 8 is a top view of the structure of FIG. 7, parts being brokenaway;

FIG. 9 is a rear edge view of the boom of FIG. 7, parts being brokenaway and shown in section;

FIG. 10 is a diagram showing the electrical and hydraulic circuits.

Referring more particularly to the drawings, the numeral 20 designates arefuse body having the usual wheels 21. The body has a rear end openingwhich is normally closed by a tailgate 22, the latter being hinged tothe upper portion of the rear of the body, as at 23, for swingingmovement. The tailgate includes side walls 24 which are connected nearthe top by top plates 25 having a lower edge 26. Below the lower edge 26is a collecting opening 27 into which refuse may be deposited bycollectors. At the rear portion of the bottom the side walls 24 areconnected by a concave bottom-forming plate 28 which has an upwardlyprojecting rear edge 29 forming the lower margin of the collectingopening 27, the plate extending forwardly and upwardly toward a floor 30in the tailgate, which is in alignment with the floor 30' of the body(see FIG. 2). In the upper portion of the interior of the tailgate is aninner ceiling 31.

The booms and associated parts Pivoted to the sides of the body onpivots 32 are booms 33. Only one of such booms is shown in FIG. 1 andwill be described, but it is to be understood that the opposite sidewall 24 of the tailgate has correspondingly positioned parts to matchthose shown on the left-hand side wall of FIG. 1.

Referring to FIGS. 7 and 9, each boom comprises spaced side plates 34and 35 which are connected at the top by top plates 36 and at the rearby plate 37 to thereby provide a hollow interior, as is clear from FIGS.1, 7 and 9. The plate 35 on the inner side of the boom has a forwardlyprojecting extension ear 38. A cylindrical boss 39 is welded into anopening 40 in the plate 34, and a similar boss 41 is welded into anopening 42 in the plate 35. Each boss has a bushing therein such as thebushing 43 shown in FIG. 7. A shaft 44 extending horizontally throughthe tailgate has its ends projecting through arcuate slots 55 in theside walls and journaled in the bushings 43 of the bosses 39 and 41 oneach side of the tailgate. Within each boom 33 and keyed to the shaft 44is a double bar lever arm 45. Each boom 33 is inverted Y-shaped havinglower legs 46 and 47. A hydraulic cylinder 48 is pivoted at its lowerend as at 49 to the boom leg 46. The extensible ram portion 50 ispivoted to the lower end of the adjacent lever arm as .at 51, FIG. 7. Ascraper-packer plate 52 has its upper edge welded to the shaft 44, asshown in FIG. 1, and has its lower edge in the form of a scraper blade,as at 53.

Another shaft 54 connects the ears 38 of the booms on the two sides ofthe tailgate. The ears 38 are so on the pivots 32. The shaft 54 supportsthe lower edge of an upwardly projecting apron 56, as is clear from FIG.1.

On each side wall 27 of the tailgate is a boom-operating hydrauliccylinder 57 having its upper end pivotally connected to the side wall,as at 58, and having its extensible ram portion 59 pivotally connectedas at 60, to the lower arm portion 47 of each boom. Supported adjacentto the pivot 58 on each of the side walls is a stop block 61.

In order 'to provide for the raising of the tailgate when required thereare hydraulic cylinders 62 which are pivoted at one end to the body, asat 63, and which have extensible ram portions pivoted, as at 64, to thetailgate. Extensible movement of the rams 62 will cause raising of thetailgate on the pivots 23.

Operation of the scraper-packer plate A the end of a packing stroke theparts are in the position shown in FIG. 2 wherein the packer plate 52has exerted a packing force on the refuse to force it into the storagecompartment. It is apparent from FIG. 2 that, while the main part ofthis storage compartment is in the main body 20 of the refuse vehicle,the chamber C in the forward portion of the tailgate between the innerceiling 31 and the floor portion 30 provides an extension of the storagecompartment and increases the effective size thereof.

It is assumed that the refuse collectors have been depositing refuse Rin the hopper formed by the concave bottom 28 of the tailgate. As a newcycle starts, cylinders 57 start to slowly retract their rams 59 andsimultaneously cylinders 48 start to retract their rams 50. Thus theshaft 44 for the scraper-packer plate 52 starts to move in the slots 55and the lever arms 45 start to rock the shaft 44 to cause swingingmovement of the scraper-packer plate from the position of FIG. 2 to theposition of FIG. 3. In FIG. 3 it will be noted that the shaft 44 hasmoved rearwardly in the slots 55 and that the packer plate has swungupwardly toward horizontal. At the same time the apron 56 moves alongbeneath the ceiling 31 to maintain a closure for the space above theshaft 44.

The rams 48 and 57 continue to retract until the position of FIG. 4 isreached, where the rams 48 are fully retracted and the scraper-packerplate 52 is in a nearly horizontal position. Thereafter, swingingmovement of the scraper-packer plate stops, but swinging movement of thebooms on their pivots 32 continues as the rams 59 continue theirretraction in the cylinders 57. This causes movement of the parts to theposition of FIG. 5 where the scraper-packer plate is ready to startscraping the refuse upwardly and forwardly on the concave bottom 28. Toaccomplish such scraping movement, extensible movement of the rams 50 inthe cylinders 48 begins and the other hydraulic actuators 57 remain outof operation. During such extensible movement of the rams 50 the leverarms 45 are actuated in a direction to swing the scraperpacker plateupwardly and forwardly along the bottom wall 28 as at a in FIG. 6, andultimately to the position b of FIG. 6. In position b the rams 50 of thecylinders 48 are fully extended. Thereafter, extensible movement of therams 59 of the cylinders 57 start to again cause pivotal movement of thebooms 33 and movement of the parts from position b of FIG. 6 to thepacking position of FIG. 2 to end the cycle.

. Automatic safety feature When the scraper-packer plate is moving fromthe position of FIG. 4 to the position of FIG. 5, if there is a rigidbulky piece of refuse, such as a large stick of wood or metal,resistance to movement of the scraper-packer plate may be encountered.This would normally exert a tremendous strain on the tailgate, packerplate, and associated parts. With the present invention, however, whensuch an occurrence takes place, the abnormal pressure created in thehydraulic system will actuate a pressure switch having a fluid pressureline 66 leading thereto and cause operations to be hereinafterdescribed, following the description of the electrical and hydrauliccircuit.

Electrical and hydraulic circuit Referring to FIG. 10, each time theoperator wants the packer plate to re-cycle, he must press the manualstart button 70 which is mounted on the curb side of the tailgate. Thiscloses the circuit to the relay coil 76 which closes the switch 77 andprovides for flow of current through the relay and through the lines 80and to the pressure switch. This provides for boom movement, as will behereinafter explained, and as soon as the booms start to move rearwardlyfrom the position of FIG. 2 such movement allows limit switch 74 toclose. This establishes the holding circuit through the relay and lines80, 75, 73 and 72, keeping the coil 76 energized. There is now power tothe pressure switch 65 through the lines and 75. At this stage ofoperation the pressure switch is in the dotted line position andelectric current flows through line 81, through line 82, through line85, to the solenoid S Electricity also flows through lines 86, 87 and 88to the solenoid S to shift the spool valve 89 to the right.

The hydraulic system on the right hand side of FIG. 10 includes areservoir 90 with a hydraulic line 91 leading from the reservoir throughthe pump 92, through line 93, to the hydraulic spool valve 89. Theenergization of the solenoid S shifts the spool valve to the rightwhereby oil can flow from line 93 into line 94 which leads to theretracting side 95 of the boom cylinders 57 to cause retraction of therams 59. At the same time, oil is exhausted from the boom cylinders 57through the lines 96 and 97, through the spool valve 89, through lines98, through the shifted spool valve 99, and through lines 100 and 101 tothe retraction side of cylinders 48 to cause retraction of the rams 50.The fluid exhausted from cylinders 48 goes through lines 102 and 103back to the tank 90. The flow of electric current through the line 82from the pressure switch and through line 85 has energized the solenoidS to shift the spool valve 99 to the right, whereby the above describedoperation becomes possible.

This starts both the booms and the packer plate swinging toward the rearfrom the position of FIG. 2 toward the position of FIG. 3. When theparts arrive at the postion of FIG. 4 where the rams 50 are completelyretracted, the limit switch 104 is opened, breaking the circuit to thesolenoid S and allowing the valve 99 to return to neutral. The rams 59,however, continue to retract to cause swinging of the boom from theposition of FIG. 4 to the position of FIG. 5. When the booms arrive atthe position of FIG. 5, one of them hits a stop S which creates a backpressure in the hydraulic system that trips the pressure switch 65 tomove the switch lever from the dotted line position of FIG. 10 to thefull line position. This de-energizes line 81 and energizes line 105.Line 105 goes through normally-closed limit switch 106 and line 107 tosolenoid S to shift the spool valve 99 to the left and cause flow ofhydraulic fluid through lines 93, 98, 103 and 102 to cause operation ofthe packer plate cylinders 48 in a direction so that the rams 50 startto extend and swing the scraper-packer plate from the position of FIG. 5through the positions a and b of FIG. 6.

Safety feature operation The above described operation is what occurswhen everything is working properly. If, however, a bulky, relativelyrigid piece of refuse obstructs movement of the packer plate from theposition of FIG. 4 to the position of FIG. 5, there will be a stoppingof the movement of the booms 33 some time before they hit the stop S(FIG. 5). This stopping due to an obstruction will act the same way asthe stop S, that is, it will create a back pressure in the hydraulicsystem to swing the pressure switch from the dotted line position (FIG.to the full line position. This stops the final retraction movement ofthe rams 59 of the boom, and immediately shifts the operation over toelectric line 105 to start the extension movement of the rams 50somewhat ahead of time, there- 'by starting swinging movement of thescraper-packer plate while it is held somewhat above normal position aof FIG. 6 so that there is enough space for the lower edge 53 of thescraper-packer plate to ride over the obstructing piece. This willdeliver to packing position all of the refuse which is in a level abovethe obstruction. At the same time, the operator can then pull out theobstructing piece. This safety device, therefore, permits the cycle tocontinue without interruption, and also prevents abnormal stresses onthe parts which might otherwise occur because of the obstruction.

Whether or not the device is operating normally or abnormally, when thepacker plate arrives at position b of FIG. 6, it trips the limit switch106 to the dotted line position, causing electricity to flow through theline 108 to the solenoid 8*. This causes a shifting of the valve 89 tothe left and allows hydraulic fluid to flow into the cylinders 57 on aside to cause extension of the rams 59 and cause swinging of the boomsand packer plate from position b of FIG. 6 to the position shown in FIG.2. During this movement the refuse is packed into the storagecompartment as augmented in size by the auxiliary chamber C in thetailgate. When the rams 59 are fully extended they move limit switch 74to the dotted line position to de-energize the coil 76, which allows theswitch 77 of the start relay to open, thereby de-energizing thecircuits. When the boom gets up to the position of FIG. 2, it hits theswitch of the pressure switch 65, forcibly moving it from the solid lineposition to the dotted line position so that the circuits are ready fora new cycle.

The stop button 109 can be operated at any time to break the electriccircuit and interrupt the cycle if there is some obstruction which wouldrequire this. If this obstruction is such that it is necessary to raisethe booms in order to clear the obstruction, the boom up button 110 maybe pressed to cause operation of the boom in a raising direction. Assoon as the button is released, the movement of the boom stops. Afterthe obstruction is cleared, the start button may again be pressed tocontinue the movements, which can be done at any point in the circle.

Various changes and modifications may be made without departing from thespirit of the invention, and all of such changes and modifications arecontemplated as may come within the scope of the claims.

What we claim is:

1. In a refuse body having a refuse hopper provided with a bottom andsides, said bottom having a rear portion and a forward portion, boomspivoted to said sides and having upwardly-projecting portions, ascraperpacker plate for scraping refuse from said hopper into said body,a pivotal connection between an upper portion of said scraper-packerplate and upwardly-projecting portions of said booms, operating meansoperatively connected to said booms and scraper-packer plate for causingsimultaneous rearward swinging movement of the booms and swinging of thescraperpacker plate on its pivotal connection with the booms over a loadin the hopper to a rearward position, said operating means alsoproviding for independent swinging movement of said scraper-packer plateon its pivotal connection with the booms when the booms are in saidrearward position, said booms being so located with respect to thehopper bottom and the hopper bottom being so curved that when the boomsare in said rearward position the hopper bottom is concentric with theaxis of swinging movement for the scraper-packer plate on its pivotalconnection with the booms, whereby the scraper-packer plate may scraperefuse from the rear portion of the hopper to the forward portionthereof while the booms are stationary.

2. A refuse body as defined in claim 1 wherein said operating means isalso arranged to provide for forward swinging movement of the booms withthe scraper-packer plate after the latter has scraped refuse forwardlyin the hopper and after its independent swinging movement has stopped,to thereby cause packing of refuse into the refuse body.

3. A refuse body as defined in claim 1 in which said operating meansincludes at least one fluid pressure operated ram for causing swingingof the booms, and at least one fluid pressure operated ram for causingswinging of the scraper-packer plate.

4. A refuse body as defined in claim 3 in which the fluid pressureoperated ram for the booms is connected between a side of the hopper anda boom, and in which the fluid pressure operated ram for thescraper-packer plate is connected to one of the booms and acts betweensaid boom and the scraper-packer plate.

5. A refuse body as claimed in claim 1 in which there is a ceilingbetween said sides and above said refuse hopper, and in which there isan apron connected to the upper ends of the booms which projectsupwardly toward said ceiling to prevent back flow of refuse.

6. A refuse body as claimed in claim 3 in which the booms and fluidpressure operated rams are mounted externally on the sides of the refusehopper.

7. A refuse body as claimed in claim 1 in which the pivot for the boomsis between lower portions of the booms and lower portions of the hoppersides adjacent the forward portion of the hopper bottom.

8. A refuse body as claimed in claim 3 in which at least one boom haslegs projecting angularly forwardly and rearwardly below its pivot, andin which the fluid pressure operating ram for swinging the booms isconnected between a hopper side and the forwardly-extending leg, and inwhich the fluid pressure operated ram for operating the scraper-packerplate is connected to the rearwardly-projecting leg of the boom -to actbetween said leg and said scraper-packer plate.

9. A refuse body as claimed in claim 1 in which the pivotal connectionbetween the scraper-packer plate and the booms comprises shaftextensions from the plate which are journaled in the booms, and in whichthere is a lever arm rigidly connected to one of said shaft extensions,and in which the fluid pressure operated ram for swinging thescraper-packer plate is connected between a lower portion of the boomand said lever arm.

10. In a refuse body having a refuse hopper member provided with abottom and having a scraper member for scraping refuse from said hoppermember, said scraper member having a lower scraping edge, mounting meansfor one of said members providing for relative movement between saidscraper member and hopper member to cause disposition of the scraper ina scraping position relative to the hopper member with said scrapingedge adjacent said bottom of the hopper member, a fluid pressurecircuit, means including a fluid pressure operated ram in said circuitfor causing said relative movement, another fluid pressure operated ramoperatively connected to said scraper member for causing scrapingmovement of the latter to remove refuse from the hopper when the partsare disposed in scraping relationship, means including a pressure switchin said hydraulic circuit responsive to back pressure in the circuitwhen an obstruction is encountered during said relative movement betweenthe hopper member and scraper member for stopping said relative movementtoward one another, and means responsive to said stopping for causingpremature operation of the first mentioned ram for said scraper memberto start premature scraping movement of said scraper member so that thecycle of operation may continue without interruption,

with said scraping edge spaced from the hopper bottom a suflicientdistance to ride over the obstruction.

11. In a refuse body having a refuse hopper provided with a bottom andhaving a scraper for scraping refuse from said hopper, said scraperhaving a lower scraping edge, mounting means for said scraper providingfor movement of said scraper member with respect to said hopper to causedisposition of said scraper in a scraping position relative to thehopper with said scraping edge adjacent said bottom of the hopper, afluid pressure circuit, means including a fluid pressure operated ram insaid circuit for causing said movement of the scraper, another fluidpressure operated ram connected to said scraper for causing scrapingmovement of the latter to remove refuse from the hopper when the partsare disposed in scraping relationship, means including a pressure switchin said hydraulic circuit responsive to back pressure in the circuitwhen an obstruction is encountered during said movement of the scrapertoward the hopper for stopping said movement, and means responsive tosaid stopping for causing premature operation of the first mentioned ramfor said scraper to start premature scraping movement of said scraper sothat the cycle of operation may continue without interruption, with saidscraping edge spaced from the hopper bottom a sufficient distance toride over the obstruction.

12. In a refuse body having a refuse hopper provided with a bottom andhaving a pivotally-supported scraper for scraping refuse from saidhopper, said scraper having a lower scraping edge, booms pivoted toopposite sides of said hopper and having upwardly projecting portions,means including a pivotal connection between said scraper and upwardlyprojecting portions of said booms providing for movement of said boomsand scraper with respect to said hopper to cause disposition of saidscraper and its pivotal connection in such a position relative to thehopper that said scraping edge is in scraping position adjacent saidbottom of the hopper, a fluid pressure circuit, means including a fluidpressure operated ram in said circuit for swinging said booms on theirpivotal connections to cause such movement of the booms, another fluidpressure operated ram between one of said booms and said scraper forcausing swinging movement of the latter including swinging movement toremove refuse from the hopper after the parts have been disposed inscraping relationship, means including a pressure switch in saidhydraulic circuit responsive to back pressure in said circuit when anobstruction is encountered during said movement of the booms toward thehopper for stopping said movement, and means responsive to said stoppingfor causing premature operation of the ram for said scraper to startpremature refuse scraping swinging movement of said scraper so that thecycle of operation may continue without interruption, with said scrapingedge spaced from the hopper bottom a suflicient distance to ride overthe obstruction.

13. In a refuse body having a storage compartment and having a refusereceiving tailgate pivoted on the rear end of the storage compartmentand having sides and a forwardly and upwardly inclined hopper-formingbottom with an elevated forward edge, booms having lower portionspivoted to the sides of the tailgate adjacent said forward edge of thehopper bottom, a shaft extending transversely of the tailgate andconnecting upper ends of the booms, said booms being swingable from asubstantially upright position projecting above the forward edge of thehopper bottom to a rearwardly-projecting position, a scraper-packerplate suspended from said boomconnecting shaft and swingable on the axisof said shaft, whereby the scraper-packer plate and booms may swingsimultaneously rearwardly to move the scraper-packer plate over the loadto a rearward position preparatory to scraping, the hopper bottombeingconcentric with respect to the axis of swinging movement of thescraper-packer shaft when the booms are in said rearwardly-projectingposition and so disposed that the scraper-packer plate may then swing onits shaft axis to scrape refuse from the rear of the hopper bottom tothe forward edge thereof, operating means for swinging said booms, andoperating means for swinging said scraper-packer plate.

14. A refuse body as claimed in claim 13 in which the tailgate has aceiling and a floor, with the latter extending forwardly from theforward edge of the hopper-forming bottom, and in which the operatingmeans for the booms functions to swing the booms, together with thescraperpacker plate, to packing position to deliver refuse from thehopper into the compartment formed between the floor and ceiling of thetailgate after the scraper-packer plate has scraped refuse from thehopper bottom, which compartment increases the effective size of therefuse body.

' 15. In a refuse body having a storage compartment and having atailgate pivotally connected to the rear of the body and provided withoppositely disposed sides, and with a collecting opening at its rear, aforwardly and upwardly curved bottom for said tailgate forming a hopperto receive refuse deposited in the collecting opening, booms havinglower portions pivoted to lower external side portions of the tailgate,a shaft extending transversely through the tailgate and having its endsconnecting upper end portions of said booms, there being openings in theside wall through which said shaft ends extend, a scraperpacker platesuspended from said shaft within the tailgate, fiuid pressure-operatedmeans pivotally connected between lower portions of said booms and saidshaft for rocking the latter to cause pivotal movement of thescraper-packer plate relative to the booms, fluid pressureoperated meanspivotally connected between external side Walls of the tailgate and thebooms for causing swinging movement of the booms on their pivots, thepivot for said booms and for the scraper-packer plate being so locatedrelative to the hopper bottom as to provide for the hereinafterdescribed movements, and control means for the fluid-pressure operatedmeans to cause the following sequence of such movements: first, aswinging of the scraper-packer plate upwardly and rearwardly on itspivot axis away from packing position while the booms are simultaneouslyswinging in a rearward and downward direction on their pivots until thescraper-packer plate is in a rearwardly projecting position over theload; second, a continued swinging of the booms without independentswinging of the scraper-packer plate until the lower edge of thescraper-packer plate is in a position to start scraping refuse forwardlyand upwardly along the hopper bottom; third, a swinging of only thescraper-packer plate on its pivot axis until its scraping edge hastraveled the length of the hopper bottom; and, finally, a swinging ofonly the booms to bring the scraper-packer plate into substantiallyupright packing position. i

16. A refuse body as claimed in claim 15 in which the forwardly andupwardly curved bottom of the tailgate leads to a tailgate floor wherebythe final swinging movement of the booms causes the scraper-packer plateto deliver refuse from the hopper into the tailgate compartment abovesaid tailgate floor, which compartment increases the effective size ofthe refuse body storage compartment.

GERALD M. FORLENZA, Primary Examiner. A. J. MAKAY, Assistant Examiner.

1. IN A REFUSE BODY HAVING A REFUSE HOPPER PROVIDED WITH A BOTTOM ANDSIDES, SAID BOTTOM HAVING A REAR PORTION AND A FORWARD PORTION, BOOMSPIVOTED TO SAID SIDES AND HAVING UPWARDLY-PROJECTING PORTIONS, ASCRAPERPACKER PLATE FOR SCRAPING REFUSE FROM SAID HOPPER INTO SAID BODY,A PIVOTAL CONNECTION BETWEEN AN UPPER PORTION OF SAID SCRAPER-PACKERPLATE AND UPWARDLY-PROJECTING PORTIONS OF SAID BOOMS, OPERATING MEANSOPERATIVELY CONNECTED TO SAID BOOMS AND SCRAPER-PACKER PLATE FOR CAUSINGSIMULTANEOUS REARWARD SWINGING MOVEMENT OF THE BOOMS AND SWINGING OF THESCRAPER-PACKER PLATE ON ITS PIVOTAL CONNECTION WITH THE BOOMS OVER ALOAD IN THE HOPPER TO A REARWARD POSITION, SAID OPERATING MEANS ALSOPROVIDING FOR INDEPENDENT SWINGING MOVEMENT OF SAID SCRAPER-PACKER PLATEON ITS PIVOTAL CONNECTION WITH THE BOOMS WHEN THE BOOMS ARE IN SAIDREARWARD POSITION, SAID